Shedding mechanism for looms



Dec. 3, 1929. R. G. TURNER SHEDDING MECHANISM FOR LOOMS.

Filed Aug. 4, 1927 Patented Dec. 3, 1929 UNITED STATES PATENT OFFICERICHARD GREENLEAIE TURNER, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TOCROMIPTON 8: KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A. COR-PORATION OF MASSACHUSETTS SHEDDING MECHANISM FOR LOOMS Application filedAugust 4, 1927. Serial No. 210,654.

This invention relates to improvements in shedding mechanism moreparticularly designed for weaving a name or fancy figure in such fabricsas towels etc. and it is the general object of the invention to providemeans whereby a single pattern controlling actuating member such as adobby jack may be made effective to control two different warp threads.

In the weaving of certain fabrics such as terry towels it is desirableto incorporate a name into the cloth to indicate ownership, the warpsforming the name being controlled by mechanism separate from the mainshedding mechanism which controls all the other warps of the fabric.With such auxiliary pattern mechanism as may conveniently be used it isnot possible to get letters of sufficient height where one harness jackcontrols but one thread. The names usually run lengthwise of the fabricso as to be readable from one of the selvages and the warp threads to becontrolled by the auxiliary mechanism may be either in the center or atone side of the fabric. It is common to run astripe of color, suchasblue, lengthwise through the center of the towel, the latter usuallybeing white. 011 one side of the towel white letters will appear on ablue background while on the other side blue letters will appear. Thename is not necessarily readable from left to right on both sides of thecloth, the letters on one side appearing in correct order but theletters on the opposite side usually appearing in reversed order. Thetowel will usually have two sets of piles for each letter, one set oneach side, and the colors of the pile forming warps are alternated. Itis an important object of my present invention to provide a simple meansfor causing one harness lever or jack to control a pair of pile warps sothat one warp of one color will be raised while the other warp ofanother color will be. lowered.

It is a more particular object of my present invention to control twoheddle cords by one harness jack, one of the cords being connecteddirectly to the harness jack and the other cord being connected to areversing device so that the cords will move in opposite directions.When weaving fabrics other than terry towels such an arrangement permitsa finer effect in the weave than would be obtained if both warp threadsand heddle corlds were connected directly to the harness ae r.

The heddle cords are usually provided with weights termed lingoes whichact to lower the heddle cord when the harness jack moves to permit adown motion of the corresponding warp thread. When using the reversingdevice already referred to I find that the lingo or weight for theheddle cord attached to the reversing device serves as a counter weightto the harness jack and in order to offset the effect of this I providea somewhat heavier lingo to have direct action on the harness jack. Inthis way the lifting tendency of the lingo connected to the reversingdevice is counteracted.

With these and other objects in view which will appear as thedescription proceeds, my invention resides in the combination andarrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein a convenient embodiment of myinvention is shown,

Fig. 1 is a front elevation of the upper portion of the loom having myinvention applied thereto, and

Fig. 2 is an end elevation looking in the direction of arrow 2, Fig. 1.

Referring to the drawings it will be seen that I have indicated a partof the loom frame, preferably the arches, at 10 having mounted thereonan auxiliary shedding mechanism 11 which may be of the general formshown in patent to Gordon No. 1,060,977 issued May 6, 1918. Saidauxiliary shedding mechanism 11 has a plurality of harness jacks orlevers 12 which are raised and lowered by means of a pattern surface notshown herein but fully set forth in the afore said patent. It issufficient for the purpose of my present invention to state that theharness levers 12 move up and down and under control of the patternsurface, the movements I weightor lingo 29.

In carrying my invention into eifect I secure a stand to the loom frame10 and provide the upper end thereof with a horizontally extending stud21 which is perpendicular to the harness jacks or levers 12. There arepivotally mounted on said stud a plurality of rock levers 22 which arepreferably although not necessarily spacedapart a distance equal to thespacing of the levers 12 by washers 22.

A second bracket 23 is secured to the loom frame and has a horizontalslot 24 therein through which extends a bolt 25 by means of whichdepending arm 26 may be adjustably held to the bracket 23. The lower endof the arm 26 has secured thereto a small comber board 27 which liessubstantially under the jacks 12 and rock levers 22.

The warp control is effected by means of heddle cords one of which isindicated at 28 as being connected directly to the corresponding jack 12and extending downwardly through comber board 27 to have secured to thelower end thereof a relatively large The other heddle cord is indicatedat 31 and has the upper end there of attached to the right hand end ofthe corresponding rock lever as viewed in Fig. 2, said second cordextending downwardly through the comber board 27 and having secured tothe lower end thereof a relatively light weight or lingo 32; Said cords28 and 31 are provided with warp eyes '30 and 33, respectively.

The left hand end of each of the rock levers 22 is connected by means ofa link 34' to the corresponding jack or lever 12 as shown in Fig. 2. Itis to be understood that there are as many harness jacks or levers 12 asthere are rocking levers 22 in use, but it possible to employ otherharness levers 12 to perform the functions set forth in the aforesaidGordon patent without being connected to the rocking levers.

In operation the lovers 12 will move up and down in a predeterminedorder under influence of the pattern mechanism which is to determine theparticular design to be w ven into the fabric. The relatively largeweights 29 together with the weight of the lovers 12 hold thelatternormally in down position,- the smaller weights 32 being overbalance'dso to have a negligible lifting action on said jacks or levers 12. Whenany jack is lifted the corresponding roclring lever 22 will be rocked ina right hand direction as viewed in Fig. 2, the raising of link 34permitting the associated weight 32 to rock the lever 22 to lower thecorresponding warp eye 83. The harness lever 12 will remain up so longas it is held in that position by the pattern chain and when it againfalls the weight 29 will act to lift the relatively lighter weight 32 sothat there will be no interference with the normal down motion of a jacklever 12'.

From the foregoing it will be seen that I have provided a very simplemechanism wherein two warp threads may be controlled by one harness jackso that the threads may be moved in opposite directions by a singlemovement of the jack. It will further be seen that I have connected oneof the heddle cords directly to the harness jack andthat' the otherheddlecord for each pair is connected to a reversing motion. It willfurther be seen that the relation of the weights 29 and 32 is such thatthe harness jacks 12 are free to move properly without being interferredwith by the lifting force exerted by the relatively lighter weights 29.While Ihave described the invention in connectionwith terry towels yet Ido not wish to be limited to such fabrics, as the principle of theinven-.

the other, a pair ofheddle cords one of which is directly connectedtothe harness lever, a rocking lever having'opposite'ly eX- tendingarms, a link connecting said ha'rness lever and one of the armsof therocking lever, the other of'the heddle cords being connected to theother arm of the rocking lever, and weighted means tending normally tolower said cords.

2'. In a shedding mechanism for a loom, a harness lever to move from oneposition to the other, a pair of weighted heddle cords one of'which isconnected. directly to the harness lever, 'a 'rooking lever havingoppositeiy extending arms, a link connecting the harness lever withoneofthe arms, the other arm being-operatively related to the other of theheddle cords, whereby movement of the harness lever moves said heddlecords in opposite.- directions.

3.111 shedding mechanism for a loom, a harness lever to move from oneposition to the other, a heddle cord connected directly to the harnessleverand having a relatively large weight thereon tending normally tomove said cord downwardly, a secondheddle cord having a lighter weighttending normally to move said second cord downwardly, and ireversingmechanism operatively connected to the harness lever and said secondnamed ,cord, whereby movement of said harness vlever fromone position tothe other moves said cords; in opposite directions, the larger-wei htof-the cord attached to the harness lever bal'ancingthe tendency of thelighterv weight to? lift the harness lever;

4. In shedding mechanism for a loom, a harness lever to move from oneposition to the other, a pair of heddle cords operatively controlled bythe harness lever to be moved in opposite directions thereby, one ofsaid cords being provided with a relatively heavy weight and exerting adirect downward pull on said harness lever and the other cord beingprovided with a relatively light weight, and means to cause the lightweight to tend to exert a lifting pull on said harness lever, the heavyweight balancing the tendency of the light weight to lift the harnesslever.

5. In shedding mechanism for looms, a pair of separate harness cords,means to cause either one of said cords to move against gravity when theother cord moves with gravity, a harness lever connected directly to oneof the cords, a relatively heavy weight for the cord connected to theharness lever, and a lighter weight for the other cord, the heavierweight counteracting the tendency of the lighter weight to lift theharness lever.

6. In a shedding mechanism for looms, a pair of harness cords havingtheir lower ends independent of each other, means connected to the upperends of the cords to cause either cord to move in a given direction whenthe other cord moves in the opposite direction, a harness leverconnected to one of the cords, weighted means connected to the lastnamed cord which is attached to the harness lever, said weighted meanstending to move the harness lever down, and means tending to lower theother cord.

7 In a shedding mechanism for looms, a pair of harness cords havingtheir lower ends independent of each other, means connected to the upperends of the cords to cause either cord to move in a given direction whenthe other cord moves in the opposite direction, a harness leverconnected to one of the cords, and weighted means connected to the cordsat the lower end thereof tending to move the harness lever down, saidWeighted means including a heavy weight for the cord connected to thelever and a relatively light weight for the other cord.

In testimony whereof I have hereunto affixed my signature.

RICHARD GREENLEAF TURNER.

